php上传图片

暈
move_uploaded_file不就搞定了？

你可以Google php 上传文件，一切搞定

class upload//上传类
{
  var $upload_name;
  var $upload_tmp_address;
  var $upload_filetype;
  var $file_type;
  var $file_server_address;
  var $upload_file_size;
  var $formattype;
  public $upload_server_name="";
  function upload_file($i,$address,$source,$filetype,$upload_must_size)
  {
   $this->upload_name = $_FILES[$source.$i]["name"];    //取得上传文件名
   $this->upload_tmp_address = $_FILES[$source.$i]["tmp_name"];    //取得临时地址
   $this->file_type=array();
   $this->file_type = array_merge($this->file_type,$filetype); //允许上传文件的类型
   $this->upload_filetype = $_FILES[$source.$i]["type"];
   $this->upload_file_size = $_FILES[$source.$i]["size"];  //上传文件的大小
   $this->formattype = substr($this->upload_filetype,6);
   $this->upload_server_name = date("YmdHis").$this->upload_file_size.".".$this->formattype;
   if(in_array($this->upload_filetype,$this->file_type))
   {
     if($this->upload_file_size < $upload_must_size)
     {
     $this->file_server_address = $address."/".$this->upload_server_name;
       move_uploaded_file($this->upload_tmp_address,$this->file_server_address);//从TEMP目录移出
     }
     else
     {
      echo("文件容量太大");
     }
   }
   else
   {
    echo("不支持此文件类型，请重新选择");
   }
  }
}
//参数i，前台表单type为file的input个数，命名为 aaaaa1,aaaaa2...aaaaan,i就是n
//参数address,存放上传文件的文件夹
//参数source,前台表单名根，也就是aaaaa
//参数filetype，可上传的类型，数组，值如image/gif
//参数upload_must_size，文件限制最大大小
//使用时new一下upload类，如  dd new = upload;
//注意address所指向的文件夹有写入权限

-------html----------
<html>
<head>
<title>PHP_文件上传</title>
</head>
<body>
<form name="upload_form" action="upload.php" method="post" enctype="multipart/form-data">
<input type="hidden" name="MAX_FILE_SIZE" value="5000000" />
选择文件:<input name="upload_file" type="file" />
<input type="submit" value="上传" />
</form>
</body>
</html>--------php--------------
<?php
$upload_file=$_FILES["upload_file"]["name"];        //获取文件名
$upload_tmp_file=$_FILES["upload_file"]["tmp_name"];      //获取临时文件名
$upload_filetype=$_FILES["upload_file"]["type"];    //获取文件类型
$upload_status=$_FILES["upload_file"]["error"];   //获取文件出错情况$upload_dir="d:/php/upload/";               //指定文件存储路径
echo $upload_file."<BR>";
echo $upload_tmp_file."<BR>";switch($upload_status)
    {
        case 0:echo " ";break;
        case 1:echo "上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值。";break;
        case 2:echo "上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。";break;
        case 3:echo "文件只有部分被上传。";break;
        case 4:echo "没有文件被上传。";break;
        case 6:echo "没有找到临时文件目录。";break;
        case 7:echo "文件写入失败。";break;
        }                   //分析文件出错情况并给出提示
$errorchar=array ("-"," ","~","!","@","#","$","%","^","&","(",")","+",",","（","）","？","！","“","”","《","》","：","；","
——");
                                                  //定义非法字符集
foreach($errorchar as $char)
{
    if(strpos($upload_file,$char))
        {
            $upload_file=str_replace($char,"_",$upload_file);
            echo "文件名中含有非法字符！已经替换为\"_\"<br>";
            }
    }//循环排除替换文件名中的非法字符
$upload_path=$upload_dir.$upload_file;   //定义文件最终的存储路径和名称
echo $upload_path."<br>";
if(is_uploaded_file($upload_tmp_file) )
{

        if(file_exists($upload_path)) echo "同名文件已经存在，请修改你要上传的文件名！";//检查是否有相同文件存在
        else if(move_uploaded_file($upload_tmp_file,$upload_path)) echo "文件已经成功上传，点击查看<a
href=\"upload/".$upload_file."\" target=\"_blank\">".$upload_file."</a>";         //把文件从文件临时目录移动到上传目录
        else echo"文件上传失败。";
}?>

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